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Staff Costs

12 Months Ended

Dec. 31, 2020

Classes Of Employee Benefits Expense [Abstract]

3. Staff costs

Included in research and development expenses:

	2020		2019		2018
	(in thousands)
	£		£		£
Wages and salaries		3,492		3,304		2,761
Social security costs		430		395		314
Pension costs		189		140		139
Share-based payments		2,412		1,878		835
		6,523		5,717		4,049

Included in administrative expenses:

	2020		2019		2018
	(in thousands)
	£		£		£
Wages and salaries		1,387		1,190		790
Social security costs		135		115		75
Pension costs		47		37		37
Share-based payments		1,893		1,348		960
		3,462		2,690		1,862

Total employee benefit expense		9,985		8,407		5,911

The average number of staff employed under contracts of service were:

	2020		2019		2018
	(number)
Research and development activities		24		23		18
Administrative activities		6		5		4
		30		28		22

Directors’ remuneration & other benefits

	2020		2019		2018
	(in thousands)
	£		£		£
Directors’ remuneration		1,167		1,222		1,143
Pension and other benefits		61		52		51
		1,228		1,274		1,194

The number of directors who exercised share options in 2020 was nil (2019: 1; 2018: 1). The gain on exercise of these options was nil (2019: £1.4 million; 2018: £4.2 million).

3. Staff costs (continued)

The above amounts for remuneration include the following in respect of the highest paid director:

	2020		2019		2018
	(in thousands)
	£		£		£
Directors’ remuneration		861		780		739
Pension and other benefits		59		48		47
		920		828		786